UW Burke Herbarium species comparison

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Digitaria insularis

Digitaria sanguinalis

hairy crabgrass
Habit Freely branching annual, often prostrate to ascending and rooting at the lower nodes, the culms hollow, up to 3 dm. tall.
Leaves

Sheaths open, with stiff hairs 2-3 mm. long;

ligules truncate to obtuse, 1.5-2 mm. long;

blades flat, 4-6 mm. broad, the margins turning upward on the ligule as slight ridges.
Flowers

Inflorescence of several racemes 5-12 mm. long, digitate in 2 or 3 whorls; articulate blow the glumes;

spikelets 2-flowered, the lower sterile, paired on one side of a triangular rachis; first glume about 0.5 mm. long, the second about 2 mm. long;

sterile lemma and fertile lemma each about 3 mm. long, appressed-hairy, the lateral nerves prominent;

stamens 3.

Digitaria insularis

Digitaria sanguinalis
Flowering time July-October
Habitat Lawns, gardens, wastelots, and other disturbed areas.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from Eurasia
Conservation status Not of concern
Sibling taxa
D. ischaemum, D. sanguinalis
D. ischaemum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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